Process of making brake-shoes.



No. sae-,037. PATBNTED DEC. 1a, 1906.

y W. D. SARGENT.

PROCESS or MAKING BRAKE SHOES..y

APPLICATION FILED FEB. 20.1904.

2 SHEETSSHBETL PATENTEI? DEG. 18, 1906.

No'I 839,037.

W. D. SARGENT. PROCESS 0F MAKING BRAKE SHOP APPLICATION FILED TBB. 2D.MVO/L 2 SHEETS-SHEET 2.

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mlllllllla lx UNITED .sTAfIlnsi Av'P'Adnrrr OFFICE- f NQ. 839,037.

To all whom t may concern: y

Be it known that I, WILLIAM D. SARGENT,"

a' citizenoffthe United'QStates, residing at New York,'in theStateof`New'York,'have 5I invented av certain new and useful `Process ofMaking Brake-Shoes, of which vthe following is a specification. i

l5 body rcan be formed by casting in a metal mold, vwhile thev hacking,that is the part l"having the attaching means thereon, can be" l 20'variety of. forms offback, the Awearin ,'25 ing'of shoes in whicMyinvention relates to the'metallic' wearing blocks used upon railwaybrakes, and

'l'orced brake shoe. v

vTh'e'primary object of myv invention is, to. construct a brake shoe 1nwhich the 'wearlng face, the two ysides and the two ends oli-the magieseparately 'of steel plate or cast metal,

f' whereby one 'mold may b'e used With a-,large U face the sides, andthe ends being generally of a common standardv io'rm and size, 'whilehav-' Ing a greaty many dlfierentA forms (5f-backs.'

v Other objects a're, to provide for rapid cool' roast metal isintermixed with malleable metal parts; t'o provide convenient means ofpacking gieenk pande'd metal iilling for compound wear'ng, 44soles;to'provide an el'licient Inode of attalehf' 3o ing the back to a castsolo; to provideffor,

making the entire Wearingsurfaee rof"-Inixed :3.netal; t'o vprovide are-inlforced shoe which can be used more than once; vto improve theprocess'esfof casting shoc's, and to generally brake shoes. 'other'advantages which-will herelnal'te'rapf -pear,'1 attain by means ol' theprocess hereinafter describeil' and illustrated' inl 'the ac# vided withseats for the brake head, an at- 401 companying drawings, inwhichl- Ifigure 1 is a central. longitudinal section 1 through brake shoe madeaccording, to my process, with compound 'metal 'sole and svepjarateback;

45 Fi ure A2 is a sectional view of the mold Whic `I use, `showing thehalves of the mold open; L 1' Figure Sisa section of the mold closed andafsupporting back placedthereon andthe 5o-expanded metal putin lacereadyforlthe pouring oi' thee'ast meta sole;

A1n 1 y s tigure 4 isa side velevatio'rrof the mold; f

'Figure 5 is a central longitudinal section of ment of the back tothegsole,y

y Specification of Letters Patent.4 Appennini 'nea rebrmy'o, 1904. `anniNc. 194.610.

l i fratentednec. 18,1906.

- Figure i's r-a perspective view of an irn- `pwroved steel back for usein this process; and

igure 7 is `a section, on line (7) in' Figure 6,'

A l 'ticewith a sole"separately cast thereon; articularly to,A methodsof making a reine" Figure 10.is an under plan of' the skeleton block,and

--Figures 11 and 12 are respectively an end.-

*drag or frictional quality, and the harder cast iron'for purposes ofdurability and for holding the mass together'. Bymy process it ispossible to form'ay'shee of this character and to combine Witl Isueha1vwearing sole a variety of jkindsoi supporting back having any desiredmeans oi holding vthe wearing sole thereon. .',llhe process isequally`useful in making shoes with' plain castI iron WearingsOles attached toanydesired i'o'rfn of back. Forming the backs separatelyr enables theprovision or' the backs at a vl'ow'cost and without requiring a large.nul'nberoiE dill'erent kinds of metal molds and "makes it possible tomake a great variety of 'iprmsoi" backs with the varying attaching 3 5increasejthe elljiclency 'and I'educe'the cost 0i. These objects,together with' means employed thereon. ln its simplest form .'theproceeding is as follows: Referring to Figures 1 and 3,1pro'videaback6,which in this 4inst'ance'is shown as made' oi malleable castingformedin' a'sand mold, and is propart, 12, is made withan open back and hasseating surfaces 1,2 to receive the edges ef "t e.Supportingback-, aslshown in Figure 3. L .perating'with'thisfhalf of the mold`is a hingedportion' 13, whiclrii'tsupon the portion "l 2 in sucheJ `inanr'ler as toleave open space between the back 6 placed on its seat and the iac'e oi"the blo'ck13yf' TheQnold may then be Ioo filled with-some fragmentaryform of malleable metal such as expanded steel as shown, stu'liing thespace as full as required to get the proper proportion between themalleable and the cast metal, and leaving open spaces within therecesses 8, as shown in Figure 3. rllhereupon the molten cast iron ispoured in through the gate 14 and runways, 16, 16, an d fills all theinterstices between Kthe pieces of malleable 'metal l() and also thespaces within' the recesses-8 in'order to form dovetailed lugswhich'wiyll hold the compoupd sole upon the back of the shoe.

It will be seenfrom Figure 4 that I preferably provide these molds' inpairs, connected y by branch runs 16a and pourseveral at once.

The pouring is made endwise and the column of' metalin 16 forms al head.or pressure, in order `to make the shoe very dense, while the multipleinlets allow of rapid filling of the Imolds. v1n case the shoe is to bemade of the form of Figure 5, it will be understood of course that theback seating portion '12 of the'niold 12, which'reeeives the ends of theback 6 will extend forward enough to eoyei the openings forv theprojections 9"". Iny fdliiiiiig a long driver shoe, as illustrated inFigure8,iI pack the expanded metal only in the wearing parts A11b and11c and use the open space 11l asthe runway in the mold for thecastmetal in pouring. By this means the metal runs in very freely and inthe parts where the wear comes, that is parts 11b and 11, the cast metalis cooled very quickly and makes a very hard durable material'ov-er thetread and Harige,

v will be noted that this plate back is thus continuous without openingsand lills the space 12in themold, so as to form one complete side of themold in pouring.

It will be seen that by this. method of procedure the molten imitalmaybe applied quite hot and liquid, in which condition it willeasilylill the intrnstices in thel expanded metal, and the molten metal comingin contact with the metallic mold on all vsides will be very quicklycooled, and thispreveuts it, in spitey of its high temperature,'-lfroininjuring Ythe quality oi the expanded metal. time the sudden cooling ol'the molten east metal will give it a very dense close grained structurecontributing durability.

lt will be observed l'uri her, that in the making oll the backing, whichmay be ol'ia m'ore expensive material, a very small quantity of metal isused and that in wearing al .lt the same used. The block 21 whichservesas both a brake head and a back for the shoe, has notches 22 and23 for attachment ,of -the sole yby casting thereon7 as will be plainfrom the drawin Otherwise, instead of notches the base o the block mayhave an undercut groove all around the side, as shown in under lplan in`Figure 14, and the shoe sole cast vthereon as shown in Figure 13. Inthis or in any other of the constructions, I may when desired use suchstrengthening means a's thc rods orwires 25 buried in the sole 11 asshown, it being understood that they ma be placed on the'base of theblock 21 or ot erwise in the mold as may be convenient, `and may takethe place of the metal' 10. The attaching portions of the wearing solenot being eX osed to wear, makes a very durable V and et cient and atthe same time a perfectly safe shoe. It is .of great advantage to havethe entire wearing face of the shoe always of the same composition and`)ractically the same throughout its surface oi wear upon the wheel.Other' advantages will readily occur to those familiar `with the art.

Having' thus described my invention and illustrated its use, what lclaim as `new, and desire to secure by Letters Patent, is the following:s

1. The process of making brake shoes which consists in providing a backhaving attaching means thereon, placing the salue in a mold in which thesaid back forms one side, and thereupon pouring in molten metal to fillthe space for the wearing iortion ol the shoe, substantially asdescribed.

2. 'lhe process ol' making brake shoes which consists in providing ahaclchaving attaching means thereon, placing the same in a mold in whichthe said back lorms one side, partially [lliug the space therein withtragments oll metal and then ouring in molten metal to lill theinterstices ietween said fragments, substantially as described.

3. 'lhe process ol making brake shoes which consists in providing a backhaving attaching means thereon, placing the same in' a metal mold inwhich the said back forms expanded metal and molten cast iron to form fa wearing solo, substantially as described.

4. The process ol' making brake shoes which consists m placing in ametal lnold a supporting back, (Illing the. space lor the sole most theentire weight ol' the shoe may be l partially with expanded metal, amlthere- IIO upon lling the interstices between the expanded metal Withmolten cast iron, substantially'as described. l

5. The roeess of making separate Wearing soles for brake shoes byprovidin, a metal mold in which one side is formed Y a shoe back placedtherein, partially filling the space in the mold 'with pieces ofmalleable metal and then pouring in a filling of molten cast iron. j l

,6. A brake shoe comprisinga supporting back having attaching means,`and a wearing sole enga ingr said means, castl thereupon and composethroughout its entire length and Width of malleable metal pieces havingthe interstices therein filled with cast metal, substantiallv asdescribed.

7. A rake shoe comprising a cast back having under-cut recesses thereinand a Wearing sole cast thereon and in the recesses, consisting ofalternate portions of malleable metal and cast metal, said malleablemetal i and ca'strnetal ofthe sole extending clear through to the faceon all sides of the shoe, substantially as described:

.- 8. A brake shoe comprisinga back and a body, said body cast thereon,being coinposed ofmixed malleable and cast metal, and s its surfaces onallsides being hardened in casting, substantially as described.lntestimony Whereor1 I have hereunder 'signed myname in the presence ofthe twoA subscribed Witnesses.

' WILLIAM D. SARGENT.

u Witnesses:

GEORGE H. SARGENT, D.*W. YnoKLnr.

